With billions in taxpayer dollars at stake, the Obama administration has taken a "passive" approach to identifying potential fraud involving the president's health care law, nonpartisan congressional investigators say in a report released Wednesday.

The notion that mobs of Americans are actively plotting to cheat the Affordable Care Act by waiting until they get sick and then finding an excuse to sign up for health insurance is cherished by two groups: anti-Obamacare conservatives and insurance companies.

Zenefits, a San Francisco health insurance start-up facing regulatory scrutiny, plans to lay off 250 people starting Friday, David Sacks, the chief executive, says.

The California legislature Monday approved a new health care tax, capping a months-long quest to safeguard over $1 billion in annual Medi-Cal funding the federal government had threatened to take away.

Covered California on Wednesday announced it selected VSP Vision Care as its vision insurance provider for adults statewide.

Federal regulators proposed what they said was a slight rise in payments for insurers that offer private Medicare plans, a closely watched figure as this coverage becomes increasingly central to the companies’ business.